* {
    margin: 0;
    padding: 0;
}

#Sport {
    height: 100%;
}

#SportHead {
    height: 10%;
}

.videolist {
    display: flex;
    flex-wrap: wrap;

}

.line {
    position: fixed;
    top: 50%;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: red;
    overflow: hidden;
}

video {
    border-radius: 6px;
    margin: 10px;

}